Good lookin girl so far and sweet idea with the music lol. Might have to try that.. One thing concerns me though.. Your space is kind of cramped right now and your girl is getting real bushy and is just barely getting into her flowering stage. She's gonna stretch a whole lot.. Double or more what she is right now and she's also going to bush out in every direction, so keep that in mind. Only speaking from first hand experience with all my autos in DWC. They can definitely grow bigger than advertised if you're doing it right in hydro. One grower got 22 ounces of think different out of 5 plants in DWC with a scrog! That's nearly 4.5 oz a plant! Everything else is cool though. No noticeable deficiencies and she looks like a happy bushmonster.
Just a few tips from a fellow dwc grower to the next, For the next 3-4 weeks, you'll want your ppm around 1200-1400 and your PH at 5.8 for optimal intake of nutrients. It's ok if it swings here and there, just keep it above 5.5 and below 6. I made the mistake of missing cal/mag during my bloom phase and ended up with some spots showing deficiencies. Found it best to stick with 5ml of cal/mag per gal to avoid that.
It may not be too late to LST her. You'll get a good increase in yield. Do it right and you'll get more dense nugs instead of airy popcorn buds. If you decide to LST, start SLOW so you don't damage the main stem. At this point, she will be stretching an inch a day or more for the next 2 weeks so you'll have to work with lst'ing every single day, maybe even twice a day. If not LST, try a training screen like a scrog and spread out her branches. These methods will take advantage of your grow space and save you a lot of height space with the addition of spreading the canopy of the plant out so more light can penetrate through.
As for your hours, you can drop her down to 20/4 :204: but remove the CO2 in the dark hours.
I'm doing a 'think different' grow in DWC with LED myself but I'm only on day 3. Haven't started a thread yet but It'd be cool growing along right behind you.
G/L welcome to AFN and here's some grow karma coming for way.
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